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问题 选择题

某金属R的单质晶体中，原子的堆积方式如下图(甲)所示，其晶胞特征如下图(乙)所示，原子之间相互位置关系的平面图如下图(丙)所示。下列叙述正确的是

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A．金属R晶体中，R原子按“ABCABC…”方式堆积

B．R原子的配位数为8

C．晶体中原子空间利用率为68%

D．R可能是锌

答案

答案：A

单项选择题

Recently, I flew to Las Vegas to attend a meeting. As we were about to arrive, the pilot announced with apology that there would be a slight (16) before setting down. High desert winds had (17) the airport to close all but one runway. He said that we would be (18) the city for a few minutes waiting to (19) . We were also told to remain in our seats meanwhile with our seat belts fastened (20) there might be a few bumps(颠簸). Well, that few minutes turned into about four-five minutes, including a ride that would make a roller coaster(过山车) (21) by comparison. The movement was so fierce that several passengers felt (22) and had to use airsickness bags. As you might guess, that’ s not a good thing to have happen in a(n) (23) space because it only (24) to increase the discomfort of the situation.

About twenty minutes into the adventure, the entire airplane became very (25) There was now a sense of anxiety and fear that could be (26) noticed. Every passenger simply held on for dear life …except one. A (27) was having a good time！ With each bump of the (28) , he would let out a giggle (咯咯地笑)of delight. As I observed this, I (29) that he didn’t know he was supposed to be afraid and worried about his (30) . He neither thought about the past nor about the future. Those are what we gown--ups have learned from (31) . He was (32) the ride because he had not yet been taught to fear it. Having understood this, I took a deep breath and (33) back into my seat, pretending I was (34) on a roller coaster. I smiled for the rest of the flight. I even (35) to giggle once or twice, much to the chagrin(随恼) of the man sitting next to me holding the airsickness bag.

29（）

A.quiet 

B.hot 

C.dirty 

D.crowded
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单项选择题

宋代的“刺配刑”设立之初衷，本意是为宽贷（）

A．流罪

B．死刑

C．徒刑

D．凌迟刑
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